I ended up with a tm-1 and tm-2 simply due to great used prices locally, sold the tm-2 and defiantly miss the extra y travel, but i needed the tool changer that was on the tm-1 I had. Maybe it was just the used machines I had, but I feel the tm-1 is more ridged, having less spindle head extension. for prototype it may be less of a care, rigid vs travel and the type of work you do, but I think the sweet spot is the tm-2 overall.
I have debated a vf-2 from time to time, working in my home garage the single phase was great, though i do have a 20hp phase perfect for my lathe now. the thing stopping me from pulling the trigger is i can run the tm and lathe at the same time, a vf would draw more and require more air (need larger compressor, mines tiny), this would force me to run only one machine at a time (i pull 97 amp on my 100 amp service with both spindles loaded with lights and compressor)
also as a one man band right now, im only on the machines 25% of the day anyways shaving cycle time is not gonna get me much value when im doing design/sales.
im happy with the tm power. milling 1045 steel today, 0.375" doc, 0.05 woc, 5500rpm, 100ipm, sitting at 90% load. its no best, but makes the parts reasonably quick
have a great day